10000211220 has 72 divisors (see below), whose sum is σ = 30431681280. Its totient is φ = 2658133440.

The previous prime is 10000211209. The next prime is 10000211261. The reversal of 10000211220 is 2211200001.

It is a super-2 number, since 2×10000211220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33340 + ... + 145299.

It is an arithmetic number, because the mean of its divisors is an integer number (422662240).

Almost surely, 2^10000211220 is an apocalyptic number.

10000211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10000211220 is an abundant number, since it is smaller than the sum of its proper divisors (20431470060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10000211220 is a wasteful number, since it uses less digits than its factorization.

10000211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178965 (or 178960 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10000211220 its reverse (2211200001), we get a palindrome (12211411221).

The spelling of 10000211220 in words is "ten billion, two hundred eleven thousand, two hundred twenty".